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// Copyright 2007 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview DOM pattern to match any children of a tag.
*
* @author robbyw@google.com (Robby Walker)
*/
goog.provide('goog.dom.pattern.AllChildren');
goog.require('goog.dom.pattern.AbstractPattern');
goog.require('goog.dom.pattern.MatchType');
/**
* Pattern object that matches any nodes at or below the current tree depth.
*
* @constructor
* @extends {goog.dom.pattern.AbstractPattern}
*/
goog.dom.pattern.AllChildren = function() {
};
goog.inherits(goog.dom.pattern.AllChildren, goog.dom.pattern.AbstractPattern);
/**
* Tracks the matcher's depth to detect the end of the tag.
*
* @type {number}
* @private
*/
goog.dom.pattern.AllChildren.prototype.depth_ = 0;
/**
* Test whether the given token is on the same level.
*
* @param {Node} token Token to match against.
* @param {goog.dom.TagWalkType} type The type of token.
* @return {goog.dom.pattern.MatchType} {@code MATCHING} if the token is on the
* same level or deeper and {@code BACKTRACK_MATCH} if not.
* @override
*/
goog.dom.pattern.AllChildren.prototype.matchToken = function(token, type) {
this.depth_ += type;
if (this.depth_ >= 0) {
return goog.dom.pattern.MatchType.MATCHING;
} else {
this.depth_ = 0;
return goog.dom.pattern.MatchType.BACKTRACK_MATCH;
}
};
/**
* Reset any internal state this pattern keeps.
* @override
*/
goog.dom.pattern.AllChildren.prototype.reset = function() {
this.depth_ = 0;
};
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